12-letter words containing r, l, f
- solway firth — an arm of the Irish Sea between SW Scotland and NW England. 38 miles (61 km) long.
- soprano clef — a sign locating middle C on the bottom line of the staff.
- space-filler — a short article of little or no importance written to fill space in a magazine or newspaper
- spencer gulf — an inlet of the Indian Ocean in S Australia, between the Eyre and Yorke Peninsulas. Length: about 320 km (200 miles). Greatest width: about 145 km (90 miles)
- sprachgefuhl — a sensitivity to language, especially for what is grammatically or idiomatically acceptable in a given language.
- sprightfully — in a sprightful manner
- squirrelfish — any of several brightly colored, nocturnal fishes of the family Holocentridae, inhabiting shallow waters of tropical reefs, especially the reddish Holocentrus ascensionis of the West Indies, armed with sharp spines and scales.
- sr flip-flop — (hardware) (Or "RS flip-flop") A "set/reset" flip-flop in which activating the "S" input will switch it to one stable state and activating the "R" input will switch it to the other state. The outputs of a basic SR flip-flop change whenever its R or S inputs change appropriately. A clocked SR flip-flop has an extra clock input which enables or disables the other two inputs. When they are disabled the outputs remain constant. If we connect two clocked SR flip-flops so that the Q and /Q outputs of the first, "master" flip-flop drive the S and R inputs of the second, "slave" flip-flop, and we drive the slave's clock input with an inverted version of the master's clock, then we have an edge-triggered RS flip-flop. The external R and S inputs of this device are latched on one edge (transition) of the clock (e.g. the falling edge) and the outputs will only change on the next opposite (rising) edge. If both R and S inputs are active (when enabled), a race condition occurs and the outputs will be in an indeterminate state. A JK flip-flop avoids this possibility.
- stalactiform — resembling or shaped like a stalactite.
- starter flat — a compact flat marketed by price and size specifications to suit the requirements of first-time home buyers
- state flower — a flower chosen as an official symbol of a U.S. state.
- stelliferous — having or abounding with stars.
- stormfulness — the quality or state of being stormful
- streamer fly — an artificial fly having a wing or wings extending beyond the crook of the fishhook.
- strike fault — a fault that trends parallel to the strike of the strata that it offsets.
- strobiliform — shaped as a strobilus
- subfactorial — the number of ways a group of objects can be arranged so that none of the objects are in their original or correct place
- subfertility — below-average fertility
- sulfarsenide — any compound containing an arsenide and a sulfide.
- sulfonylurea — any of a group of oral drugs, as tolbutamide, that stimulate the pancreas to secrete more insulin, used to treat diabetes
- sulphur tuft — a poisonous basidiomycetous fungus, Hypholoma fasciculare, having a sulphurous yellow cap and found in clumps on and around broad-leaved trees
- superfrontal — a piece of cloth placed over an altar and frontal and hanging down a few inches over the front of the altar
- surface mail — the system, especially a government postal system, of sending mail by truck, train, or boat, as opposed to airmail.
- synchroflash — of or relating to photography employing a device that synchronizes the photoflash with the shutter.
- tail feather — one of the feathers making up a bird's tail
- taper relief — (in Britain) a system of relief from capital gains tax under which the percentage of a chargeable gain considered taxable is reduced for each whole year (from April 1998) that the asset was held by the vendor
- target rifle — a rifle designed especially for shooting at targets.
- telesoftware — the transmission of computer programs on a teletext system
- terrifically — extraordinarily great or intense: terrific speed.
- terrifyingly — to fill with terror or alarm; make greatly afraid.
- the far left — the more extreme supporters or advocates of social, political, or economic change, reform, or revolution designed to promote the greater freedom, power, welfare, or comfort of the common people
- the flickers — the cinema
- the red flag — a socialist song, written by James Connell (1852–1929), Irish political activist, in 1889
- thiosulfuric — of or derived from thiosulfuric acid.
- thrust fault — a low-angle reverse fault produced in rocks subjected to thrust.
- thunderflash — a pyrotechnic device which is noisy, but not dangerous, and which is used in military exercises
- tick trefoil — any of numerous plants belonging to the genus Desmodium, of the legume family, having trifoliolate leaves and jointed pods with hooked hairs by which they adhere to objects.
- tickler file — a file consisting of memoranda, notices, electronic signals, or the like that serves to remind the user of matters that must be attended to.
- tie-off rail — trim rail.
- tin-fluoride — stannous fluoride.
- to a frazzle — absolutely; completely (esp in the phrase burnt to a frazzle)
- to play fair — If you say that someone plays fair, you mean that they behave or act in a reasonable and honest way.
- trace fossil — a fossilized track, trail, burrow, boring, or other structure in sedimentary rock that records the presence or behavior of the organism that made it.
- trans female — a person who was born male but whose gender identity is female.
- transferable — to convey or remove from one place, person, etc., to another: He transferred the package from one hand to the other.
- treble staff — a staff, bearing a treble clef.
- tree of life — a tree in the Garden of Eden that yielded food giving everlasting life. Gen 2:9; 3:22.
- trefoil arch — an arch with cusplike intrados.
- trefoil knot — a knot having the form of a trefoil.
- trifoliolate — having three leaflets, as a compound leaf.